diff --git a/Reconstruction/VKalVrt/NewVrtSecInclusiveTool/NewVrtSecInclusiveTool/NewVrtSecInclusiveTool.h b/Reconstruction/VKalVrt/NewVrtSecInclusiveTool/NewVrtSecInclusiveTool/NewVrtSecInclusiveTool.h
index 2749aa5c1aea70ac5329211bbd2e6b5917bb9c22..4891053cda2c45e97e028321c01ecfbb58fda7de 100755
--- a/Reconstruction/VKalVrt/NewVrtSecInclusiveTool/NewVrtSecInclusiveTool/NewVrtSecInclusiveTool.h
+++ b/Reconstruction/VKalVrt/NewVrtSecInclusiveTool/NewVrtSecInclusiveTool/NewVrtSecInclusiveTool.h
@@ -191,8 +191,8 @@ namespace Rec {
 
      struct DevTuple 
      { 
-       static const int maxNTrk=100;
-       static const int maxNVrt=100;
+       static constexpr int maxNTrk=100;
+       static constexpr int maxNVrt=100;
        int   nTrk;
        float pttrk[maxNTrk];
        float Sig3D[maxNTrk];